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Understanding Modified Binders

Herman Marais introduces emerging technologies in bitumen modification including polymer modification (PMB), crumb rubber, micro filler and nanotechnologies. He concludes that PMB is the most popular modifier with exciting future prospects, crumb rubber use is expected to increase as storage stability risks are reduced and new blends are developed, micro filler shows promise, and nanotechnologies will become less expensive with increased production.

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Binder modification has become the norm as the performance limits of conventional bitumen have been reached. The author believes practitioners need to understand all modifiers to provide the best match for each application. This presentation provides an overview of different modifiers available and how to use them to overcome different binder limitations.

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